A collection of related data is called Database. A database is a data structure that stores organized information. Most databases contain multiple tables, which may each include several different fields. Some of the different types of database are Relational database, NoSQL database, Distributed database, Commercial database,End-user database. Some of the key features of database are controls who can access and edit the data, allows data to be shared by many users, creates backups, stores data in one central location.